If a firewall is filtering communication between an RSA ClearTrust Agent and Server, it's possible the TCP connection times out (on the firewall) and no subsequent packets are allowed.

This issue has been resolved in a hot fix for RSA ClearTrust Agent 3.5 for Apache. Contact RSA Security Customer Support to obtain hot fix 3.5.0.38, or request the latest fix level (which is cumulative, and contains fixes from previous fix levels).

NOTE: To use this hot fix, you must know the timeout time for TCP connections on your firewall. Read the Readme file that comes with the hot fix carefully, as it contains important configuration information.